A resistor is tested by applying several currents and recording the corresponding potential differences. The plotted graph of ΔV (vertical axis) versus I (horizontal axis) is a straight line described by the equation ΔV=4.5(V/A)I. What is the resistance of the resistor?
a) 0.22Ω
b) 9.0Ω
c) 4.5Ω
d) 2.3Ω